add Buildr's report directory

Signed-off-by: noboru kudoh <noboru.kudoh@gmail.com>
 fix spelling miss

Signed-off-by: noboru kudoh <noboru.kudoh@gmail.com>
 remove grep within file, only find-grep

Signed-off-by: noboru kudoh <noboru.kudoh@gmail.com>
 add scala grep mode for study

Signed-off-by: noboru kudoh <noboru.kudoh@gmail.com>